Now I have some tests to show how to trigger all of the stripe CardError except invalid_number, expired_card, and processing_error -- ones that we'll need to simulate in some other way
Raymond Yee
parent
447b5973c2
commit
9d17f93fac
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@ -91,6 +91,24 @@ def filter_none(d):
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# if you create a Customer object, then you'll be able to charge multiple times. You can create a customer with a token.
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# http://en.wikipedia.org/wiki/Luhn_algorithm#Implementation_of_standard_Mod_10
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def luhn_checksum(card_number):
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def digits_of(n):
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return [int(d) for d in str(n)]
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digits = digits_of(card_number)
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odd_digits = digits[-1::-2]
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even_digits = digits[-2::-2]
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checksum = 0
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checksum += sum(odd_digits)
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for d in even_digits:
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checksum += sum(digits_of(d*2))
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return checksum % 10
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def is_luhn_valid(card_number):
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return luhn_checksum(card_number) == 0
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# https://stripe.com/docs/tutorials/charges
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def card (number=TEST_CARDS[0][0], exp_month=1, exp_year=2020, cvc=None, name=None,
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@ -144,7 +162,7 @@ class StripeClient(object):
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def create_token(self, card):
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return stripe.Token(api_key=self.api_key).create(card=card)
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def create_customer (self, card=None, description=None, email=None, account_balance=None, plan=None, trial_end=None):
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def create_customer(self, card=None, description=None, email=None, account_balance=None, plan=None, trial_end=None):
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"""card is a dictionary or a token"""
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# https://stripe.com/docs/api?lang=python#create_customer
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@ -211,9 +229,37 @@ class StripeClient(object):
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# how to tell whether money transferred to bank account yet
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# best practices for calling Events -- not too often.
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# Errors we still need to catch:
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#
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# * invalid_number -- can't get stripe to generate for us. What it means:
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#
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# * that the card has been cancelled (or never existed to begin with
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#
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# * the card is technically correct (Luhn valid?)
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#
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# * the first 6 digits point to a valid bank
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#
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# * but the account number (the rest of the digits) doesn't correspond to a credit account with that bank
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#
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# * Brian of stripe.com suggests we could treat it the same way as we'd treat card_declined
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#
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# * processing_error:
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#
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# * means: something went wrong when stripe tried to make the charge (it could be that the card's issuing bank is down, or our connection to the bank isn't working properly)
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# * we can retry -- e.g., a minute later, then 30 minutes, then an hour, 3 hours, a day.
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# * we shouldn't see processing_error very often
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#
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# * expired_card -- also not easily simulatable in test mode
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class StripeErrorTest(TestCase):
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"""Make sure the exceptions returned by stripe act as expected"""
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def test_cc_test_numbers_luhn_valid(self):
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"""Show that the test CC numbers supplied for testing as valid numbers are indeed Luhn valid"""
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self.assertTrue(all([is_luhn_valid(c[0]) for c in ERROR_TESTING.values()]))
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def test_good_token(self):
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""" verify normal operation """
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sc = StripeClient()
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@ -265,13 +311,85 @@ class StripeErrorTest(TestCase):
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sc = StripeClient()
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# bad card
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card1 = card(number=ERROR_TESTING['BAD_ATTACHED_CARD'][0])
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# attaching card should be ok
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cust1 = sc.create_customer(card=card1, description="test bad customer", email="rdhyee@gluejar.com")
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# trying to charge the card should fail
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self.assertRaises(stripe.CardError, sc.create_charge, 10,
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customer = cust1.id, description="$10 for bad cust")
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def test_bad_cc_number(self):
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"""send a bad cc and should get an error when trying to create a token"""
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BAD_CC_NUM = '4242424242424241'
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# reason for decline is number is not Luhn valid
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self.assertFalse(is_luhn_valid(BAD_CC_NUM))
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sc = StripeClient()
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card1 = card(number=BAD_CC_NUM, exp_month=1, exp_year=2020, cvc='123', name='Don Giovanni',
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address_line1="100 Jackson St.", address_line2="", address_zip="94706", address_state="CA", address_country=None) # good card
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try:
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token1 = sc.create_token(card=card1)
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self.fail("Attempt to create token with bad cc number did not throw expected exception.")
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except stripe.CardError as e:
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self.assertEqual(e.code, "incorrect_number")
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self.assertEqual(e.message, "Your card number is incorrect")
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def test_invalid_expiry_month(self):
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"""Use an invalid month e.g. 13."""
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sc = StripeClient()
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card1 = card(number=TEST_CARDS[0][0], exp_month=13, exp_year=2020, cvc='123', name='Don Giovanni',
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address_line1="100 Jackson St.", address_line2="", address_zip="94706", address_state="CA", address_country=None)
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class StripelibErrorTest(TestCase):
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pass
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try:
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token1 = sc.create_token(card=card1)
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self.fail("Attempt to create token with invalid expiry month did not throw expected exception.")
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except stripe.CardError as e:
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self.assertEqual(e.code, "invalid_expiry_month")
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self.assertEqual(e.message, "Your card's expiration month is invalid")
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def test_invalid_expiry_year(self):
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"""Use a year in the past e.g. 1970."""
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sc = StripeClient()
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card1 = card(number=TEST_CARDS[0][0], exp_month=12, exp_year=1970, cvc='123', name='Don Giovanni',
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address_line1="100 Jackson St.", address_line2="", address_zip="94706", address_state="CA", address_country=None)
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try:
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token1 = sc.create_token(card=card1)
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self.fail("Attempt to create token with invalid expiry year did not throw expected exception.")
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except stripe.CardError as e:
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self.assertEqual(e.code, "invalid_expiry_year")
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self.assertEqual(e.message, "Your card's expiration year is invalid")
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def test_invalid_cvc(self):
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"""Use a two digit number e.g. 99."""
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sc = StripeClient()
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card1 = card(number=TEST_CARDS[0][0], exp_month=12, exp_year=2020, cvc='99', name='Don Giovanni',
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address_line1="100 Jackson St.", address_line2="", address_zip="94706", address_state="CA", address_country=None)
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try:
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token1 = sc.create_token(card=card1)
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self.fail("Attempt to create token with invalid cvc did not throw expected exception.")
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except stripe.CardError as e:
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self.assertEqual(e.code, "invalid_cvc")
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self.assertEqual(e.message, "Your card's security code is invalid")
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def test_missing_card(self):
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"""There is no card on a customer that is being charged"""
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sc = StripeClient()
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# create a Customer with no attached card
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cust1 = sc.create_customer(description="test cust w/ no card")
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try:
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sc.create_charge(10, customer = cust1.id, description="$10 for cust w/ no card")
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except stripe.CardError as e:
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self.assertEqual(e.code, "missing")
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self.assertEqual(e.message, "Cannot charge a customer that has no active card")
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class PledgeScenarioTest(TestCase):
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@classmethod
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@ -305,7 +423,6 @@ class PledgeScenarioTest(TestCase):
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self.assertRaises(stripe.CardError, self._sc.create_charge, 10,
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customer = self._cust_bad_card.id, description="$10 for bad cust")
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@classmethod
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def tearDownClass(cls):
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# clean up stuff we create in test -- right now list current objects
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